Toby Opferkuch
(JGU Mainz)
22/05/2018, 15:30
In this talk I will present the projected sensitivities of upcoming pulsar timing arrays (PTAs) to gravitational waves produced by first-order phase transitions. In contrast to ground- or space-based detectors these experiments are sensitive to phase transitions that occur around keV to MeV energy scales. Consequently, they are excellent probes of many types of light new physics contributing...
Paul Riggins
(University of California at Berkeley)
22/05/2018, 15:50
We demonstrate that rotational superradiance can be efficient in millisecond pulsars. Measurements from the two fastest known pulsars PSR J1748-2446ad and PSR B1937+21 can place bounds on bosons with masses below 10^-11 eV. The bounds are maximally good at masses corresponding to the rotation rate of the star, where scalar interactions that mediate forces ∼ 10^7 times weaker than gravity are...
Dr
Athanasios Dedes
(University of Ioannina)
22/05/2018, 16:10
Assuming that new physics effects are parametrized by the Standard-Model Effective Field Theory (SMEFT) written in a complete basis of up to dimension-6 operators,
we calculate the CP-conserving one-loop amplitude for the decay h->gamma+gamma in general R_xi-gauges.
We use this gauge invariant amplitude and recent LHC data to check upon sensitivity to various Wilson coefficients entering from...
